======================== unified (from filesystem) ========================
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                                        'duration'  '524'
                                          'artist'  'Vladimir Komarov'
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                                     'discogstags'  "['krautrock', 'electronic', 'synth-pop', 'indie rock', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '12'
                                      'tracktotal'  '12'
                                            'date'  '1999'
                                        'comments'  ''
                                           'genre'  'mi-theremin'
                                             'bpm'  '118.6'
                                             'key'  '6A'
                                        'acoustid'  'aef45a2b-93f4-4cc0-8879-ee33961c5895'
rest: ''

======================== rawer (from filesystem) ========================

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'TDOR' (Original release time)                      '1999'
'TDRC' (Recording time)                             '1999'
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'TIT2' (Title/songname/content description)         'Voice of Theremin'
'TKEY' (Initial key)                                '6A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Vladimir Komarov'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Mode'
'TRCK' (Track number/Position in set)               '12/12'
'TSO2'                                              'Various Artists'
'TSOP' (Performer sort order)                       'Komarov, Vladimir'
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'TXXX:CATALOGNUMBER'                                'mode 76'
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'TXXX:Q-LOCALNESS'                                  '1'
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'TXXX:Q-UNU'                                        '1'
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'TXXX:discogstags'                                  ['krautrock', 'electronic', 'synth-pop', 'indie rock', 'rock']
'TXXX:lastfmtags'                                   ['russian',
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'TXXX:q-piano'                                      '1'
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'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.21 dB'
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========================== row from database ==========================
                                              'id'  772530
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Music From The Ether_ Original Works For Theremin/12 Voice of Theremin.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  524
                                           'genre'  mi-theremin
                                        'filesize'  20967295
                                           'mtime'  1620528009
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm From Ether_ For 12 theremin
                                      'tag_artist'  Vladimir Komarov
                                     'tag_release'  Music from the Ether: Original Works for Theremin
                                       'tag_title'  Voice of Theremin
                                             'bpm'  118.6
                                    'search_title'  'of':2 'theremin':3 'voice':1
                                   'search_artist'  'komarov':2 'vladimir':1
                                  'search_release'  'ether':4,5 'for':8 'from':2 'music':1 'original':6 'the':3 'theremin':9 'works':7
                                     'search_rest'  'ether':2 'for':3 'from':1 'theremin':4
                                    'search_combo'  'ether':9C,10C,16 'for':13C,17 'from':7C,15 'komarov':5B 'music':6C 'of':2A 'original':11C 'the':8C 'theremin':3A,14C,18 'vladimir':4B 'voice':1A 'works':12C
                                    'tag_tracknum'  12
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-3', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['russian', 'multiple artists', 'multiple artists with the same name', 'hot zex', 'punk tv']
                                        'tag_date'  1999
                                     'discogstags'  ['krautrock', 'electronic', 'synth-pop', 'indie rock', 'rock']

============================== file details ==============================
                                           'mtime'  1620528008.8708682  (2021-05-09 04:40:08)
                             'size'  20967295